in the 1995 paper on virtual black holes here
on p. 19 Hawking says that effective scattering on vbh would be negligible for anything except for scalar particles like Higgs and that's why we probably will never observe it since it would interact with vbh and reemerge as other particles.
(existence of vbh in q gravity is derived from application of uncertainity principle to spacetime curvature)
We have higgs now, so what does it contribute to vbh and qg theories?
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